/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayModMagnitudeCalculation.h
Extracts the Set by Caller Magnitude from a Gameplay Effect Spec
The magnitude value if found, zero otherwise
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, BlueprintPure=false, Category="Ability|GameplayEffect") float GetSetByCallerMagnitudeByTag ( const [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) & EffectSpec, const [FGameplayTag](API\Runtime\GameplayTags\FGameplayTag) & Tag ) const